Actuator



FIG. 1 is a front, top, right perspective view of an actuator, showing the new design;

FIG. 2 is a rear, bottom, right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines of even length shown in the drawings illustrate portions of the actuator that form no part of the claimed design. 

CLAIM The ornamental design for an actuator, as shown and described. 